Data from: Preparation and structure of SiOCN fibers derived from cyclic silazane/PAA hybrid precursor

Ceramic matrix composite (CMC) materials have been considered a desired
solution for lightweight and high temperature applications.
Simultaneously, among all different CMC reinforcements, Polymer-Derived
Ceramic (PDC) fibers have gained attention for the intrinsic thermal
stability and mechanical strength with simple and cost-effective synthesis
techniques. Here, carbon-rich silicon oxycarbide (SiOC) fibers were
synthesized via hand-drawing and polymer pyrolysis of a hybrid precursor
of 1,3,5,7-tetramethyl-1,3,5,7-tetravinyl-cyclotetrasilazane (TTCSZ) and
polyacrylic acid (PAA). The type of silazane reported in this work is
considered as a major precursor for SiCN, however it is unspinnable, due
to its unfavorable physical properties (low viscosity) and chemical
structure (cyclic rather than linear structure). The introduction of PAA
to TTCSZ to create a hybrid precursor remarkably improved spinnability of
the silazane and should be widely applicable to other unspinnable PDC
preceramic polymers. Investigations on structural and compositional
development of the fibers were mainly conducted via Raman spectroscopy,
Fourier-Transform InfraRed spectroscopy (FTIR), Scanning Electron
Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Nuclear Magnetic
Resonance (NMR) and ThermoGravimetric Analysis (TGA) to determine
spinnability, free carbon content, cross-linking and pyrolysis behavior of
the fibers, respectively.